SEN0262

    Gravity: Analog Current to Voltage Converter(for 4~20mA Application) SKU:SEN0262 Introduction This current-to-voltage module linearly converts 0~25mA current signals into 0~3V voltage signals. Industrial sensors or devices usually have the current signal output of 4~20 mA. With this current-tovoltage module, your main control board can easily read the current signals output from industrial sensors or devices. Normally, current signals lower than 4mA can be used for fault diagnosis, and current signals higher than 20mA can be used for overrun detection. Therefore, this module is designed with a wide range of 0~25mA detection range, which is compatible with fault detection, overrun detection applications. This module uses 0.1% high precision sense resistor and ultra-low noise rail-to-rail zero-drift op amp, so it is high accuracy, no need to calibration, and easy to use. 3.3V~5.5V wide voltage power supply, 0~3V voltage signal output, which are compatible with more main control boards, adapt to more applications. NOTE: For higher accuracy, it is recommended to use 12 or more bit ADC! Specification       Supply Voltage: 3.3~5.5V Detection Range: 0~25mA DC Measurement Accuracy: ±0.5% F.S. @ 16-bit ADC, ±2% F.S. @ 10-bit ADC Termination Resistance: 120Ω Connector Type: PH2.0-3P Product Size: 30mm * 22mm(1.18inch * 0.87inch) Board Overview Num Label  Description  1  GND  Power GND(0V)  2  VCC  Power VCC(3.3~5.5V)  3  SIGNAL  Voltage Signal Output  4  I+  Current Input  5  I‐  Current Output  Gravity: Analog Current to Voltage Converter Tutorial This tutorial will demonstrate how to use this module with Arduino control board to read current signal of 4~20mA. Please prepare a sensor or device that outputs current signal of 4~20mA. Requirements      Hardware DFRduino UNO R3 (or similar) x 1 Analog Current to Voltage Converter x 1 Sensor or Device(output 4~20mA current) x1 Gravity 3pin Sensor Cable (or several DuPont cables) x1   Software Arduino IDE, Click to Download Arduino IDE from Arduino® Connection Diagram Sample Code Before uploading the sample code, it is recommended that you use a voltmeter to confirm the actual reference voltage of the ADC on the main control board, and then modify VREF in the sample code, to improve the measurement accuracy. /*********************************************************** DFRobot Gravity: Analog Current to Voltage Converter(For 4~20mA Applicati on) SKU:SEN0262 GNU Lesser General Public License. See for details. All above must be included in any redistribution ****************************************************/ #define CurrentSensorPin A2 #define VREF 5000 // ADC's reference voltage on your Arduino,typical value :5000mV unsigned int voltage; //unit:mV float current; //unit:mA void setup() { Serial.begin(115200); } void loop() { voltage = analogRead(CurrentSensorPin)/1024.0*VREF; Serial.print("voltage:"); Serial.print(voltage); Serial.print("mV "); current = voltage/120.0; //Sense Resistor:120ohm Serial.print("current:"); Serial.print(current); Serial.println("mA"); delay(1000); } Expected Results                                                                           https://www.dfrobot.com/wiki/index.php/Gravity:_Analog_Current_to_Voltage_Converter(for_4~20mA_Application)_SKU:SEN0262 8‐7‐18